Book/Report FZJ-2016-03790

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Strömung und konvektiver Wärmeübergang beim Kreiszylinder und bei der Kugel



1979
Kernforschungsanlage Jülich, Verlag Jülich

Jülich : Kernforschungsanlage Jülich, Verlag, Berichte der Kernforschungsanlage Jülich 1591, 97 p. ()

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Report No.: Juel-1591

Abstract: Experimental results of heat transfer and flow around single circular cylinders and spheres are described in this report. The major part of the results was achieved by own experiments, which covered the range of Reynolds numbers 2 x 10$^{4}$ < Re < 5 x 10$^{6}$. Particularly the drag coefficient of cylinders and spheres was investigated as functions of the Reynolds number and surface roughness. The position of boundary layer separation and transition from laminar to turbulent flow was determined by measuring the local static pressure and skin friction. Furthermore the results of instationary boundary layer separation are reported. The results of the local and total heat transfer of cylinders are described and correlated with the flow phenomena observed. The heat transfer equations of the smooth sphere are determined in the range 10$^{2}$ < Re < 5 x 10$^{6}$ applying the mass transfer techniques at low Reynolds numbers. Besides the surface roughness effects the influence of several parameters an the flow and heat transfer are considered. Such parameters are the turbulence of the incident flow, compressibility of the fluid or tunnel blockage. The results of other authors are summarized and prepared for application in form of diagrams or formulae.


Contributing Institute(s):
  1. Publikationen vor 2000 (PRE-2000 ; Retrocat)
Research Program(s):
  1. 899 - ohne Topic (POF3-899) (POF3-899)

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 Record created 2016-07-11, last modified 2021-01-29


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